package com.ruoyi.framework.config;

import com.ruoyi.common.utils.Threads;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 线程池配置
 *
 * @author ruoyi
 **/
@Configuration
public class ThreadPoolConfig {
    // 核心线程池大小
    private final int corePoolSize = 20;

    // 最大可创建的线程数
    private final int maxPoolSize = 100;

    // 队列最大长度
    private final int queueCapacity = 500;

    // 线程池维护线程所允许的空闲时间
    private final int keepAliveSeconds = 300;

    @Bean(name = "threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setMaxPoolSize(maxPoolSize);
        executor.setCorePoolSize(corePoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setKeepAliveSeconds(keepAliveSeconds);
        // 线程池对拒绝任务(无线程可用)的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }

    /**
     * 执行周期性或定时任务
     */
    @Bean(name = "scheduledExecutorService")
    protected ScheduledExecutorService scheduledExecutorService() {
        ThreadFactory threadFactory = new ThreadFactory() {
            private final AtomicInteger counter = new AtomicInteger(0);
            @Override
            public Thread newThread(Runnable r) {
                Thread thread = Executors.defaultThreadFactory().newThread(r);
                // 设置线程名
                thread.setName("schedule-pool-" + counter.getAndIncrement());
                // 设置为守护线程
                thread.setDaemon(true);
                return thread;
            }
        };

        return new ScheduledThreadPoolExecutor(corePoolSize, threadFactory, new ThreadPoolExecutor.CallerRunsPolicy()) {
            @Override
            protected void afterExecute(Runnable r, Throwable t) {
                super.afterExecute(r, t);
                Threads.printException(r, t);
            }
        };
    }
}
